}
static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,
- int align_order)
+ unsigned int align_order)
{
if (align_order <= cma->order_per_bit)
return 0;
}
/*
- * Find a PFN aligned to the specified order and return an offset represented in
- * order_per_bits.
+ * Find the offset of the base PFN from the specified align_order.
+ * The value returned is represented in order_per_bits.
*/
static unsigned long cma_bitmap_aligned_offset(const struct cma *cma,
- int align_order)
+ unsigned int align_order)
{
- if (align_order <= cma->order_per_bit)
- return 0;
-
- return (ALIGN(cma->base_pfn, (1UL << align_order))
- - cma->base_pfn) >> cma->order_per_bit;
+ return (cma->base_pfn & ((1UL << align_order) - 1))
+ >> cma->order_per_bit;
}
static unsigned long cma_bitmap_pages_to_bits(const struct cma *cma,